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background-actor: Do not copy empty clip/unobscured regions

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Clip and unobscured regions stricly shrink during culling. If they
are already empty, simply reference the empty region to reduce allocations.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/1082
This commit is contained in:
Robert Mader 2020-02-25 20:10:48 +01:00 committed by Carlos Garnacho
parent c979cd95aa
commit 39a8c047d1
1 changed files with 12 additions and 2 deletions
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14
src/compositor/meta-background-actor.c
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@ -193,7 +193,12 @@ set_clip_region (MetaBackgroundActor *self,
{
g_clear_pointer (&self->clip_region, cairo_region_destroy);
if (clip_region)
self->clip_region = cairo_region_copy (clip_region);
{
if (cairo_region_is_empty (clip_region))
self->clip_region = cairo_region_reference (clip_region);
else
self->clip_region = cairo_region_copy (clip_region);
}
}
static void
@ -202,7 +207,12 @@ set_unobscured_region (MetaBackgroundActor *self,
{
g_clear_pointer (&self->unobscured_region, cairo_region_destroy);
if (unobscured_region)
self->unobscured_region = cairo_region_copy (unobscured_region);
{
if (cairo_region_is_empty (unobscured_region))
self->unobscured_region = cairo_region_reference (unobscured_region);
else
self->unobscured_region = cairo_region_copy (unobscured_region);
}
}
static void